CVE-2020-8819Public exploitNetwork attack vector

Payment hijacking via unauthenticated configuration overwrite

Published Feb 25, 2020 · Updated Aug 4, 2024

Origin validation error in CardGate Payments for WooCommerce 3.1.15 and earlier allows remote attackers to overwrite payment settings. The cardgate_callback function accepts unauthenticated cgp_sitesetup and token request parameters, pulls the referenced merchant configuration, and writes its IDs and keys into WordPress options without verifying the request origin. Remote attackers need a valid token for an attacker-controlled CardGate merchant account; replacing the store configuration enables unpaid order-status spoofing or diversion of subsequent payments.

CVSS severity8.1
High
EPSS probability4.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Origin validation error in CardGate Payments for WooCommerce 3.1.15 and earlier allows remote attackers to overwrite payment settings. The cardgate_callback function accepts unauthenticated cgp_sitesetup and token request parameters, pulls the referenced merchant configuration, and writes its IDs and keys into WordPress options without verifying the request origin. Remote attackers need a valid token for an attacker-controlled CardGate merchant account; replacing the store configuration enables unpaid order-status spoofing or diversion of subsequent payments.

The record

CVE
CVE-2020-8819
Published
Feb 25, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-346, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 25, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.1GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-346Origin Validation Error
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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